The main problem is in /src/wubi/backends/common/distro.py line 191, where it replaces the original correct name ("Ubuntu-Studio") into "Ubuntu Studio", which then is incorrect and does not match .disk/info.
The main problem is in /src/wubi/ backends/ common/ distro. py line 191, where it replaces the original correct name ("Ubuntu-Studio") into "Ubuntu Studio", which then is incorrect and does not match .disk/info.